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Finger dexterity tests

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https://www.readbyqxmd.com/read/28936720/development-of-finger-force-coordination-in-children
#1
Sharon Shaklai, Aviva Mimouni-Bloch, Moran Levin, Jason Friedman
Coordination is often observed as body parts moving together. However, when producing force with multiple fingers, the optimal coordination is not to produce similar forces with each finger, but rather for each finger to correct mistakes of other fingers. In this study, we aim to determine whether and how this skill develops in children aged 4-12 years. We measured this sort of coordination using the uncontrolled manifold hypothesis (UCM). We recorded finger forces produced by 60 typically developing children aged between 4 and 12 years in a finger-pressing task...
September 21, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28901660/local-steroid-injection-versus-wrist-splinting-for-carpal-tunnel-syndrome-a-randomized-clinical-trial
#2
Ho So, Vincent C H Chung, Joseph C K Cheng, Ronald M L Yip
AIM: We conducted a prospective randomized parallel clinical trial comparing the efficacy of local steroid injection and nocturnal wrist splinting in patients with carpal tunnel syndrome (CTS). METHODS: The well-validated and disease-specific Boston Carpal Tunnel Questionnaire (BCTQ) was employed and its score at 4 weeks after treatment was used as the primary outcome measure. Important secondary outcomes included patient satisfaction, the change of an objective finger dexterity test and the side effects...
September 13, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28890033/the-wada-test-might-predict-postoperative-fine-finger-motor-deficit-after-hemispherotomy
#3
Ayataka Fujimoto, Tohru Okanishi, Mitsuyo Nishimura, Sotaro Kanai, Keishiro Sato, Hideo Enoki
INTRODUCTION: Cerebral hemispherotomy is a surgical method with a high rate of seizure reduction in patients with intractable epilepsy. However, there is a probability of postoperative motor deficits. The objective of this study was to investigate whether the Wada test can help predict motor function outcomes after hemispherotomy and, therefore, may be useful in decision-making and patient selection. PATIENTS AND METHOD: A total of 13 patients with hemispherical intractable epilepsy underwent hemispherical disconnection surgeries...
September 7, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28871033/reticulospinal-contributions-to-gross-hand-function-after-human-spinal-cord-injury
#4
Stuart N Baker, Monica A Perez
Multiple descending motor pathways likely contribute to the recovery of hand motor function following spinal cord injury (SCI). Reticulospinal neurons project to spinal motor neurons controlling hand muscles and extensively sprout into gray matter structures after SCI; therefore, it has been proposed that the reticulospinal tract is one of the descending motor pathways involved in recovery of hand function after injury. To test this hypothesis, we examined the StartReact response, an involuntary release of a planned movement via a startling stimulus that engages the reticulospinal tract, by measuring reaction times from electromyographic activity in an intrinsic finger muscle during three motor tasks requiring different degrees of hand dexterity: index finger abduction, a precision grip, and a power grip...
September 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28814035/decoding-of-individual-finger-movements-from-surface-emg-signals-using-vector-autoregressive-hierarchical-hidden-markov-models-varhhmm
#5
Nebojsa Malesevic, Dimitrije Markovic, Gunter Kanitz, Marco Controzzi, Christian Cipriani, Christian Antfolk
In this paper we present a novel method for predicting individual fingers movements from surface electromyography (EMG). The method is intended for real-time dexterous control of a multifunctional prosthetic hand device. The EMG data was recorded using 16 single-ended channels positioned on the forearm of healthy participants. Synchronously with the EMG recording, the subjects performed consecutive finger movements based on the visual cues. Our algorithm could be described in following steps: extracting mean average value (MAV) of the EMG to be used as the feature for classification, piece-wise linear modeling of EMG feature dynamics, implementation of hierarchical hidden Markov models (HHMM) to capture transitions between linear models, and implementation of Bayesian inference as the classifier...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28809628/-the-effect-of-activation-of-the-shoulder-girdle-muscles-on-functional-outcomes-of-rehabilitation-in-patients-with-surgically-treated-distal-radius-fractures
#6
V Jančíková, J Opavský, P Dráč, A Krobot, I Čižmář
PURPOSE OF THE STUDY The aim of the study was to assess the functional outcomes of rehabilitation in patients with surgically treated distal radius fractures in the early postoperative period. We compared the functional outcomes of patients undergoing standard rehabilitation with the group of patients whose postoperative rehabilitation was extended with shoulder girdle exercises of the affected upper limb while the wrist was immobilized. Several indices and variables were used for the assessment of the functional therapeutic outcomes of the affected wrist...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28765808/altered-praxis-network-underlying-limb-kinetic-apraxia-in-parkinson-s-disease-an-fmri-study
#7
Stefanie Kübel, Katharina Stegmayer, Tim Vanbellingen, Manuela Pastore-Wapp, Manuel Bertschi, Jean-Marc Burgunder, Eugenio Abela, Bruno Weder, Sebastian Walther, Stephan Bohlhalter
Parkinson's disease (PD) patients frequently suffer from dexterous deficits impeding activities of daily living. There is controversy whether impaired fine motor skill may stem from limb kinetic apraxia (LKA) rather than bradykinesia. Based on classical models of limb praxis LKA is thought to result when premotor transmission of time-space information of skilled movements to primary motor representations is interrupted. Therefore, using functional magnetic resonance imaging (fMRI) we tested the hypothesis that dexterous deficits in PD are associated with altered activity and connectivity in left parieto-premotor praxis network...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28740470/manual-dexterity-in-schizophrenia-a-neglected-clinical-marker
#8
Maxime Térémetz, Loïc Carment, Lindsay Brénugat-Herne, Marta Croca, Jean-Pierre Bleton, Marie-Odile Krebs, Marc A Maier, Isabelle Amado, Påvel G Lindberg
Impaired manual dexterity is commonly observed in schizophrenia. However, a quantitative description of key sensorimotor components contributing to impaired dexterity is lacking. Whether the key components of dexterity are differentially affected and how they relate to clinical characteristics also remains unclear. We quantified the degree of dexterity in 35 stabilized patients with schizophrenia and in 20 age-matched control subjects using four visuomotor tasks: (i) force tracking to quantify visuomotor precision, (ii) sequential finger tapping to measure motor sequence recall, (iii) single-finger tapping to assess temporal regularity, and (iv) multi-finger tapping to measure independence of finger movements...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28645972/does-non-invasive-brain-stimulation-modify-hand-dexterity-protocol-for-a-systematic-review-and-meta-analysis
#9
Anthony Terrence O'Brien, Gabriel Torrealba Acosta, Rodrigo Huerta, Aurore Thibaut
INTRODUCTION: Dexterity is described as coordinated hand and finger movement for precision tasks. It is essential for day-to-day activities like computer use, writing or buttoning a shirt. Integrity of brain motor networks is crucial to properly execute these fine hand tasks. When these networks are damaged, interventions to enhance recovery are frequently accompanied by unwanted side effects or limited in their effect. Non-invasive brain stimulation (NIBS) are postulated to target affected motor areas and improve hand motor function with few side effects...
June 22, 2017: BMJ Open
https://www.readbyqxmd.com/read/28532877/task-based-mirror-therapy-enhances-ipsilesional-motor-functions-in-stroke-a-pilot-study
#10
Kamal Narayan Arya, Shanta Pandian, Dharmendra Kumar
OBJECTIVE: To examine the effect of Mirror therapy (MT) on dexterity, coordination, and muscle strength of the less-affected upper limb in stroke. DESIGN: Pre-test post-test, single group, experimental design. SETTING: Rehabilitation institute. PARTICIPANTS: Post-stroke hemiparetic chronic subjects (N = 21). INTERVENTIONS: Forty sessions of MT using various tasks in addition to the conventional rehabilitation...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28401502/the-effects-of-age-and-sex-on-hand-movement-structure
#11
A Sebastjan, A Skrzek, Z Ignasiak, T Sławińska
The aim was to investigate the effects of age and sex on hand function and ascertain age-related changes (magnitude and rate) by assessing a broad range of functional tasks with the dominant and non-dominant hands. A representative sample of 635 adults (114 males and 491 females) aged 50 years and over completed motor performance series of the Vienna Test System Parametric and non-parametric analysis and simple linear regression was used to examine the relationships. Significant relationships were observed between task performance and age and sex, although the contributions of both factors differed by varying degree...
April 11, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28295921/earlier-and-greater-hand-pre-shaping-in-the-elderly-a-study-based-on-kinematic-analysis-of-reaching-movements-to-grasp-objects
#12
Yoshiki Tamaru, Yasuo Naito, Takashi Nishikawa
BACKGROUND: Elderly people are less able to manipulate objects skilfully than young adults. Although previous studies have examined age-related deterioration of hand movements with a focus on the phase after grasping objects, the changes in the reaching phase have not been studied thus far. We aimed to examine whether changes in hand shape patterns during the reaching phase of grasping movements differ between young adults and the elderly. METHODS: Ten healthy elderly adults and 10 healthy young adults were examined using the Simple Test for Evaluating Hand Functions and kinetic analysis of hand pre-shaping reach-to-grasp tasks...
March 9, 2017: Psychogeriatrics: the Official Journal of the Japanese Psychogeriatric Society
https://www.readbyqxmd.com/read/28289680/synergy-repetition-training-versus-task-repetition-training-in-acquiring-new-skill
#13
Vrajeshri Patel, Jamie Craig, Michelle Schumacher, Martin K Burns, Ionut Florescu, Ramana Vinjamuri
Traditionally, repetitive practice of a task is used to learn a new skill, exhibiting as immediately improved performance. Research suggests, however, that a more experience-based rather than exposure-based training protocol may allow for better transference of the skill to related tasks. In synergy-based motor control theory, fundamental motor skills, such as hand grasping, are represented with a synergy subspace that captures essential motor patterns. In this study, we propose that motor-skill learning through synergy-based mechanisms may provide advantages over traditional task repetition learning...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28268399/an-effective-3-fingered-augmenting-exoskeleton-for-the-human-hand
#14
C J Gearhart, B Varone, M H Stella, B F BuSha
Every year, thousands of Americans suffer from pathological and traumatic events that result in loss of dexterity and strength of the hand. Although many supportive devices have been designed to restore functional hand movement, most are very complex and expensive. The goal of this project was to design and implement a cost-effective, electrically powered exoskeleton for the human hand that could improve grasping strength. A 3-D printed thermoplastic exoskeleton that allowed independent and enhanced movement of the index, middle and ring fingers was constructed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226567/an-effective-3-fingered-augmenting-exoskeleton-for-the-human-hand
#15
C J Gearhart, B Varone, M H Stella, B F BuSha, C J Gearhart, B Varone, M H Stella, B F BuSha, M H Stella, B F BuSha, B Varone, C J Gearhart
Every year, thousands of Americans suffer from pathological and traumatic events that result in loss of dexterity and strength of the hand. Although many supportive devices have been designed to restore functional hand movement, most are very complex and expensive. The goal of this project was to design and implement a cost-effective, electrically powered exoskeleton for the human hand that could improve grasping strength. A 3-D printed thermoplastic exoskeleton that allowed independent and enhanced movement of the index, middle and ring fingers was constructed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28192482/characterization-of-the-disruption-of-neural-control-strategies-for-dynamic-fingertip-forces-from-attractor-reconstruction
#16
Lorenzo Peppoloni, Emily L Lawrence, Emanuele Ruffaldi, Francisco J Valero-Cuevas
The Strength-Dexterity (SD) test measures the ability of the pulps of the thumb and index finger to compress a compliant and slender spring prone to buckling at low forces (<3N). We know that factors such as aging and neurodegenerative conditions bring deteriorating physiological changes (e.g., at the level of motor cortex, cerebellum, and basal ganglia), which lead to an overall loss of dexterous ability. However, little is known about how these changes reflect upon the dynamics of the underlying biological system...
2017: PloS One
https://www.readbyqxmd.com/read/27933492/comparative-analysis-of-speech-impairment-and-upper-limb-motor-dysfunction-in-parkinson-s-disease
#17
Jan Rusz, Tereza Tykalová, Radim Krupička, Kateřina Zárubová, Michal Novotný, Robert Jech, Zoltán Szabó, Evžen Růžička
It is currently unknown whether speech and limb motor effectors in Parkinson's disease (PD) are controlled by similar underlying brain processes. Based on computerized objective analysis, the aim of this study was to evaluate potential correlation between speech and mechanical tests of upper limb motor function. Speech and upper limb motor tests were performed in 22 PD patients and 22 healthy controls. Quantitative acoustic analyses of eight key speech dimensions of hypokinetic dysarthria, including quality of voice, sequential motion rates, consonant articulation, vowel articulation, average loudness, loudness variability, pitch variability, and number of pauses, were performed...
December 8, 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27917570/handwriting-difficulties-of-children-with-charcot-marie-tooth-disease-type-1a
#18
Daniel Kunovsky, Reinie Cordier, Paula Bray, Joshua Burns
Hand weakness and impaired manual dexterity have been reported in children with Charcot-Marie-Tooth disease type 1A (CMT1A). This early onset of upper limb involvement might explain frequent clinical referrals for assessment and treatment of impaired handwriting performance. The aim of this study was to examine the impact of CMT1A on handwriting speed and legibility, and identify demographic, anthropometric, and physical measures that might relate to handwriting performance. Handwriting speed (Handwriting Speed Test), handwriting legibility (Evaluation Tool of Children's Handwriting-Cursive), and hand strength (hand-held dynamometry of tip pinch, lateral pinch and grip) were assessed in 30 children with CMT1A (aged 8-17 years) and 30 age- and sex-matched controls...
March 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/27909406/assessment-of-a-wearable-force-and-electromyography-device-and-comparison-of-the-related-signals-for-myocontrol
#19
Mathilde Connan, Eduardo Ruiz Ramírez, Bernhard Vodermayer, Claudio Castellini
In the frame of assistive robotics, multi-finger prosthetic hand/wrists have recently appeared, offering an increasing level of dexterity; however, in practice their control is limited to a few hand grips and still unreliable, with the effect that pattern recognition has not yet appeared in the clinical environment. According to the scientific community, one of the keys to improve the situation is multi-modal sensing, i.e., using diverse sensor modalities to interpret the subject's intent and improve the reliability and safety of the control system in daily life activities...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27894677/factors-affecting-the-results-of-the-functional-dexterity-test
#20
Füsun Şahin, Nilgün Şimşir Atalay, Nuray Akkaya, Sibel Aksoy
STUDY DESIGN: Cross-sectional study. PURPOSE OF THE STUDY: The purpose of this study was to identify which demographic and anthropometric features affect performance (time) on the functional dexterity test (FDT). METHODS: One hundred fifty-two healthy subjects between the ages of 20 and 80 years were included in this cross-sectional study. Demographic characteristics (age, gender, height, weight, and dominant hand) and anthropometric (the girths of the first 3 fingers) variables were recorded, and the FDT (net time and total score) was performed...
November 25, 2016: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
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